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NOTE: Read the entire instruction manual before starting the
installation.
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TABLE OF CONTENTS
SAFETY CONSIDERATIONS.....................................................1
INTRODUCTION..........................................................................2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE ................................................................................2
CARE AND MAINTENANCE.....................................................2
Cleaning and/or Replacing Air Filter.......................................2
Blower Motor and Wheel.........................................................3
Cleaning Heat Exchanger.........................................................4
Electrical Controls and Wiring.................................................6
WIRING DIAGRAMS...................................................................7
TROUBLESHOOTING .................................................................7
SAFETY CONSIDERATIONS
Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified person-
nel should install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations must
be performed by trained service personnel. When working on
heating equipment, observe precautions in the literature, tags, and
labels attached to or shipped with the unit and other safety
precautions that may apply.
Follow all safety codes. In the United States, follow all safety
codes including the National Fuel Gas Code (NFGC) NFPA No.
54-1999/ANSI Z223.1-1999. In Canada, refer to the current
edition of the National Standard of Canada CAN/CGA-B149.1-
and .2-M00 Natural Gas and Propane Gas Installation Codes
(NSCNGPIC) and Amendment No. 1. Wear safety glasses and
work gloves. Have fire extinguisher available during start-up and
adjustment procedures and service calls.
REGISTERED QUALITY SYSTEM
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EFFICIENCY
RATING
CERTIFIED
CERTIFIED
Fig. 1—Model 330JAV Horizontal
A95137
Fig. 2—Model 331JAV Downflow
A94086
Fig. 3—Model 330JAV Upflow
A94085
service and
maintenance procedures
PLUS 80 2-STAGE GAS-FIRED
INDUCED-COMBUSTION FURNACES
Cancels: SP04-65 SP04-73
11-01
330JAV
331JAV
Series D
—1—